diff options
author | Vishwanath Pai <vpai@akamai.com> | 2016-06-21 14:58:46 -0400 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-06-24 11:03:23 +0200 |
commit | 7643507fe8b5bd8ab7522f6a81058cc1209d2585 (patch) | |
tree | b95ee39692d27ca7ed569d282f2257862955deb6 /net/netfilter/nfnetlink_log.c | |
parent | e1dbbc5907b53d8d53c009b3cb3dd2a0366ce45c (diff) | |
download | op-kernel-dev-7643507fe8b5bd8ab7522f6a81058cc1209d2585.zip op-kernel-dev-7643507fe8b5bd8ab7522f6a81058cc1209d2585.tar.gz |
netfilter: xt_NFLOG: nflog-range does not truncate packets
li->u.ulog.copy_len is currently ignored by the kernel, we should truncate
the packet to either li->u.ulog.copy_len (if set) or copy_range before
sending it to userspace. 0 is a valid input for copy_len, so add a new
flag to indicate whether this was option was specified by the user or not.
Add two flags to indicate whether nflog-size/copy_len was set or not.
XT_NFLOG_F_COPY_LEN is for XT_NFLOG and NFLOG_F_COPY_LEN for nfnetlink_log
On the userspace side, this was initially represented by the option
nflog-range, this will be replaced by --nflog-size now. --nflog-range would
still exist but does not do anything.
Reported-by: Joe Dollard <jdollard@akamai.com>
Reviewed-by: Josh Hunt <johunt@akamai.com>
Signed-off-by: Vishwanath Pai <vpai@akamai.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nfnetlink_log.c')
-rw-r--r-- | net/netfilter/nfnetlink_log.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c index 11f81c8..cbcfdfb 100644 --- a/net/netfilter/nfnetlink_log.c +++ b/net/netfilter/nfnetlink_log.c @@ -700,10 +700,13 @@ nfulnl_log_packet(struct net *net, break; case NFULNL_COPY_PACKET: - if (inst->copy_range > skb->len) + data_len = inst->copy_range; + if ((li->u.ulog.flags & NF_LOG_F_COPY_LEN) && + (li->u.ulog.copy_len < data_len)) + data_len = li->u.ulog.copy_len; + + if (data_len > skb->len) data_len = skb->len; - else - data_len = inst->copy_range; size += nla_total_size(data_len); break; |